In this video, I show the process of inspecting, diagnosing, and repairing the 2nd of two Echo PB-770H backpack blowers. Neither machine starts, and both are in unknown condition.

This will be a 2 part video, since there are 2 machines.
Tune-up Kit: 90122Y
Fuel Filter: Walbro 125-528
Spark Plub: NGK BPM8Y
Air Filter: A226000410
Pre Filter: A226000480